<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>

        * {
            margin: 0;
            padding: 0;
        }

        body {
            width: 100%;
            height: 1080px;
        }

        .header {
            width: 100%;
            height: 10%;
            float: left;
        }

        .header h1 {
            text-align: center;
            line-height: 108px;
        }

        .left {
            float: left;
            width: 20%;
            height: 90%;
        }

        .right {
            float: left;
            width: 80%;
            height: 90%;
        }

    </style>
</head>

<body>

    {% block header %}
        <header class="header">
            <h1>文件系统</h1>
        </header>
    {% endblock %}

    {% block left %}
        <section class="left">
            <ul>
                <li><a href="/userdata">用户资料</a></li>
                <li><a href="/filesystem">文件管理</a></li>
            </ul>
        </section>
    {% endblock %}

    {% block right %}

    {% endblock %}

</body>
</html>